在用HTML上传文件时,可读的字节数是0?
源码:
int totalBytes = request.getContentLength(); //这个是正常的
int canread = request.getInputStream().available(); //这个值总是0 HTML代码:
<form action="${root}/servlet/officeAdd.htm" method="post" enctype="multipart/form-data">
<input type="file" name="map" id="map"/>
<input type="submit" value="submit" />
</form> 我试一了下JSP SmartUpload时程序死循环,可能也是因为available()值为0,导致循环记数一直不能大于总长度,所以不退出循环。
源码:
int totalBytes = request.getContentLength(); //这个是正常的
int canread = request.getInputStream().available(); //这个值总是0 HTML代码:
<form action="${root}/servlet/officeAdd.htm" method="post" enctype="multipart/form-data">
<input type="file" name="map" id="map"/>
<input type="submit" value="submit" />
</form> 我试一了下JSP SmartUpload时程序死循环,可能也是因为available()值为0,导致循环记数一直不能大于总长度,所以不退出循环。
2。你的SmartUpload包有问题
事实,在后面的读取中:
j = request.getInputStream().read(binArray,i,totalBytes - i);
j 的值是-1,也就是说什么也没读到才返回-1。
谁能说说是什么回事?
一个是我自己写的,
一个是用SmartUpload。
我一直认为SmartUpload的原代码是不够完善的。
以下是无注释简略版自己去跟踪File1package com.jspsmart.upload;import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;public class File1 { File1() {
m_startData = 0;
m_endData = 0;
m_size = 0;
m_fieldname = new String();
m_filename = new String();
m_fileExt = new String();
m_filePathName = new String();
m_contentType = new String();
m_contentDisp = new String();
m_typeMime = new String();
m_subTypeMime = new String();
m_contentString = new String();
m_isMissing = true;
} public void saveAs(String s) throws IOException, SmartUploadException {
saveAs(s, 0);
} public void saveAs(String s, int i) throws IOException,
SmartUploadException {
String s1 = new String();
s1 = m_parent.getPhysicalPath(s, i);
if (s1 == null)
throw new IllegalArgumentException(
"There is no specified destination file (1140).");
try {
java.io.File file = new java.io.File(s1);
FileOutputStream fileoutputstream = new FileOutputStream(file);
fileoutputstream.write(m_parent.m_binArray, m_startData, m_size);
fileoutputstream.close();
} catch (IOException ioexception) {
throw new SmartUploadException("File can't be saved (1120).");
}
} public void fileToField(ResultSet resultset, String s)
throws ServletException, IOException, SmartUploadException,
SQLException {
long l = 0L;
int i = 0x10000;
int j = 0;
int k = m_startData;
if (resultset == null)
throw new IllegalArgumentException(
"The RecordSet cannot be null (1145).");
if (s == null)
throw new IllegalArgumentException(
"The columnName cannot be null (1150).");
if (s.length() == 0)
throw new IllegalArgumentException(
"The columnName cannot be empty (1155).");
l = BigInteger.valueOf(m_size).divide(BigInteger.valueOf(i))
.longValue();
j = BigInteger.valueOf(m_size).mod(BigInteger.valueOf(i)).intValue();
try {
for (int i1 = 1; (long) i1 < l; i1++) {
resultset.updateBinaryStream(s, new ByteArrayInputStream(
m_parent.m_binArray, k, i), i);
k = k != 0 ? k : 1;
k = i1 * i + m_startData;
} if (j > 0)
resultset.updateBinaryStream(s, new ByteArrayInputStream(
m_parent.m_binArray, k, j), j);
} catch (SQLException sqlexception) {
byte abyte0[] = new byte[m_size];
System.arraycopy(m_parent.m_binArray, m_startData, abyte0, 0,
m_size);
resultset.updateBytes(s, abyte0);
} catch (Exception exception) {
throw new SmartUploadException(
"Unable to save file in the DataBase (1130).");
}
} public boolean isMissing() {
return m_isMissing;
} public String getFieldName() {
return m_fieldname;
} public String getFileName() {
return m_filename;
} public String getFilePathName() {
return m_filePathName;
} public String getFileExt() {
return m_fileExt;
} public String getContentType() {
return m_contentType;
} public String getContentDisp() {
return m_contentDisp;
} public String getContentString() {
String s = new String(m_parent.m_binArray, m_startData, m_size);
return s;
} public String getTypeMIME() throws IOException {
return m_typeMime;
} public String getSubTypeMIME() {
return m_subTypeMime;
} public int getSize() {
return m_size;
} protected int getStartData() {
return m_startData;
} protected int getEndData() {
return m_endData;
} protected void setParent(SmartUpload smartupload) {
m_parent = smartupload;
} protected void setStartData(int i) {
m_startData = i;
} protected void setEndData(int i) {
m_endData = i;
} protected void setSize(int i) {
m_size = i;
} protected void setIsMissing(boolean flag) {
m_isMissing = flag;
} protected void setFieldName(String s) {
m_fieldname = s;
} protected void setFileName(String s) {
m_filename = s;
} protected void setFilePathName(String s) {
m_filePathName = s;
} protected void setFileExt(String s) {
m_fileExt = s;
} protected void setContentType(String s) {
m_contentType = s;
} protected void setContentDisp(String s) {
m_contentDisp = s;
} protected void setTypeMIME(String s) {
m_typeMime = s;
} protected void setSubTypeMIME(String s) {
m_subTypeMime = s;
} public byte getBinaryData(int i) {
if (m_startData + i > m_endData)
throw new ArrayIndexOutOfBoundsException(
"Index Out of range (1115).");
if (m_startData + i <= m_endData)
return m_parent.m_binArray[m_startData + i];
else
return 0;
} private SmartUpload m_parent;
private int m_startData;
private int m_endData;
private int m_size;
private String m_fieldname;
private String m_filename;
private String m_fileExt;
private String m_filePathName;
private String m_contentType;
private String m_contentDisp;
private String m_typeMime;
private String m_subTypeMime;
private String m_contentString;
private boolean m_isMissing;
public static final int SAVEAS_AUTO = 0;
public static final int SAVEAS_VIRTUAL = 1;
public static final int SAVEAS_PHYSICAL = 2;
}Filespackage com.jspsmart.upload;import java.io.IOException;
import java.util.*;public class Files { Files() {
m_files = new Hashtable();
m_counter = 0;
} protected void addFile(File1 file) {
if (file == null) {
throw new IllegalArgumentException("newFile cannot be null.");
} else {
m_files.put(new Integer(m_counter), file);
m_counter++;
return;
}
} public File1 getFile(int i) {
if (i < 0)
throw new IllegalArgumentException("File's index cannot be a negative value (1210).");
File1 file = (File1) m_files.get(new Integer(i));
if (file == null)
throw new IllegalArgumentException("Files' name is invalid or does not exist (1205).");
else
return file;
} public int getCount() {
return m_counter;
} public long getSize() throws IOException {
long l = 0L;
for (int i = 0; i < m_counter; i++)
l += getFile(i).getSize(); return l;
} public Collection getCollection() {
return m_files.values();
} public Enumeration getEnumeration() {
return m_files.elements();
} private SmartUpload m_parent;
private Hashtable m_files;
private int m_counter;
}
Requestpackage com.jspsmart.upload;import java.util.Enumeration;
import java.util.Hashtable;public class Request { Request() {
m_parameters = new Hashtable();
m_counter = 0;
} protected void putParameter(String s, String s1) {
if (s == null)
throw new IllegalArgumentException("The name of an element cannot be null.");
if (m_parameters.containsKey(s)) {
Hashtable hashtable = (Hashtable) m_parameters.get(s);
hashtable.put(new Integer(hashtable.size()), s1);
} else {
Hashtable hashtable1 = new Hashtable();
hashtable1.put(new Integer(0), s1);
m_parameters.put(s, hashtable1);
m_counter++;
}
} public String getParameter(String s) {
if (s == null)
throw new IllegalArgumentException(
"Form's name is invalid or does not exist (1305).");
Hashtable hashtable = (Hashtable) m_parameters.get(s);
if (hashtable == null)
return null;
else
return (String) hashtable.get(new Integer(0));
} public Enumeration getParameterNames() {
return m_parameters.keys();
} public String[] getParameterValues(String s) {
if (s == null)
throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
Hashtable hashtable = (Hashtable) m_parameters.get(s);
if (hashtable == null)
return null;
String as[] = new String[hashtable.size()];
for (int i = 0; i < hashtable.size(); i++)
as[i] = (String) hashtable.get(new Integer(i)); return as;
} private Hashtable m_parameters;
private int m_counter;
}
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;public class SmartUpload { public SmartUpload() {
m_totalBytes = 0;
m_currentIndex = 0;
m_startData = 0;
m_endData = 0;
m_boundary = new String();
m_totalMaxFileSize = 0L;
m_maxFileSize = 0L;
m_deniedFilesList = new Vector();
m_allowedFilesList = new Vector();
m_denyPhysicalPath = false;
m_forcePhysicalPath = false;
m_contentDisposition = new String();
m_files = new Files();
m_formRequest = new Request();
} /**
* @deprecated Method init is deprecated
*/
public final void init(ServletConfig servletconfig) throws ServletException {
m_application = servletconfig.getServletContext();
} /**
* @deprecated Method service is deprecated
*/
public void service(HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse) throws ServletException,IOException {
m_request = httpservletrequest;
m_response = httpservletresponse;
} public final void initialize(ServletConfig servletconfig, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse) throws ServletException {
m_application = servletconfig.getServletContext();
m_request = httpservletrequest;
m_response = httpservletresponse;
} public final void initialize(PageContext pagecontext) throws ServletException {
m_application = pagecontext.getServletContext();
m_request = (HttpServletRequest) pagecontext.getRequest();
m_response = (HttpServletResponse) pagecontext.getResponse();
} /**
* @deprecated Method initialize is deprecated
*/
public final void initialize(ServletContext servletcontext, HttpSession httpsession, HttpServletRequest httpservletrequest, HttpServletResponse httpservletresponse, JspWriter jspwriter) throws ServletException {
m_application = servletcontext;
m_request = httpservletrequest;
m_response = httpservletresponse;
} public void upload() throws ServletException, IOException, SmartUploadException {
int i = 0;
long l = 0L;
boolean flag1 = false;
String s4 = new String();
String s5 = new String();
String s6 = new String();
String s7 = new String();
String s8 = new String();
String s9 = new String();
String s10 = new String();
m_totalBytes = m_request.getContentLength();
m_binArray = new byte[m_totalBytes];
int j;
for (; i < m_totalBytes; i += j)
try {
m_request.getInputStream();
j = m_request.getInputStream().read(m_binArray, i,
m_totalBytes - i);
} catch (Exception exception) {
throw new SmartUploadException("Unable to upload.");
} for (; !flag1 && m_currentIndex < m_totalBytes; m_currentIndex++)
if (m_binArray[m_currentIndex] == 13)
flag1 = true;
else
m_boundary = m_boundary + (char) m_binArray[m_currentIndex]; if (m_currentIndex == 1)
return;
for (m_currentIndex++; m_currentIndex < m_totalBytes; m_currentIndex = m_currentIndex + 2) {
String s1 = getDataHeader();
m_currentIndex = m_currentIndex + 2;
boolean flag3 = s1.indexOf("filename") > 0;
String s3 = getDataFieldValue(s1, "name");
if (flag3) {
s6 = getDataFieldValue(s1, "filename");
s4 = getFileName(s6);
s5 = getFileExt(s4);
s7 = getContentType(s1);
s8 = getContentDisp(s1);
s9 = getTypeMIME(s7);
s10 = getSubTypeMIME(s7);
}
getDataSection();
if (flag3 && s4.length() > 0) {
if (m_deniedFilesList.contains(s5))
throw new SecurityException(
"The extension of the file is denied to be uploaded (1015).");
if (!m_allowedFilesList.isEmpty()
&& !m_allowedFilesList.contains(s5))
throw new SecurityException(
"The extension of the file is not allowed to be uploaded (1010).");
if (m_maxFileSize > 0L
&& (long) ((m_endData - m_startData) + 1) > m_maxFileSize)
throw new SecurityException(
"Size exceeded for this file : " + s4 + " (1105).");
l += (m_endData - m_startData) + 1;
if (m_totalMaxFileSize > 0L && l > m_totalMaxFileSize)
throw new SecurityException(
"Total File Size exceeded (1110).");
}
if (flag3) {
com.jspsmart.upload.File1 file = new com.jspsmart.upload.File1();
file.setParent(this);
file.setFieldName(s3);
file.setFileName(s4);
file.setFileExt(s5);
file.setFilePathName(s6);
file.setIsMissing(s6.length() == 0);
file.setContentType(s7);
file.setContentDisp(s8);
file.setTypeMIME(s9);
file.setSubTypeMIME(s10);
if (s7.indexOf("application/x-macbinary") > 0)
m_startData = m_startData + 128;
file.setSize((m_endData - m_startData) + 1);
file.setStartData(m_startData);
file.setEndData(m_endData);
m_files.addFile(file);
} else {
String s11 = new String(m_binArray, m_startData,
(m_endData - m_startData) + 1);
m_formRequest.putParameter(s3, s11);
}
if ((char) m_binArray[m_currentIndex + 1] == '-')
break;
} } public int save(String s) throws ServletException, IOException,
SmartUploadException {
return save(s, 0);
} public int save(String s, int i) throws ServletException, IOException,
SmartUploadException {
int j = 0;
if (s == null)
s = m_application.getRealPath("/");
if (s.indexOf("/") != -1) {
if (s.charAt(s.length() - 1) != '/')
s = s + "/";
} else if (s.charAt(s.length() - 1) != '\\')
s = s + "\\";
for (int k = 0; k < m_files.getCount(); k++)
if (!m_files.getFile(k).isMissing()) {
m_files.getFile(k).saveAs(s + m_files.getFile(k).getFileName(),
i);
j++;
} return j;
} public int getSize() {
return m_totalBytes;
} public byte getBinaryData(int i) {
byte byte0;
try {
byte0 = m_binArray[i];
} catch (Exception exception) {
throw new ArrayIndexOutOfBoundsException(
"Index out of range (1005).");
}
return byte0;
} public Files getFiles() {
return m_files;
} public Request getRequest() {
return m_formRequest;
} public void downloadFile(String s) throws ServletException, IOException, SmartUploadException {
downloadFile(s, null, null);
} public void downloadFile(String s, String s1) throws ServletException, IOException, SmartUploadException, SmartUploadException {
downloadFile(s, s1, null);
} public void downloadFile(String s, String s1, String s2) throws ServletException, IOException, SmartUploadException {
downloadFile(s, s1, s2, 65000);
} public void downloadFile(String s, String s1, String s2, int i) throws ServletException, IOException, SmartUploadException {
if (s == null)
throw new IllegalArgumentException("File '" + s
+ "' not found (1040).");
if (s.equals(""))
throw new IllegalArgumentException("File '" + s
+ "' not found (1040).");
if (!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is denied (1035).");
if (isVirtual(s))
s = m_application.getRealPath(s);
File file = new File(s);
FileInputStream fileinputstream = new FileInputStream(file);
long l = file.length();
int k = 0;
byte abyte0[] = new byte[i];
if (s1 == null)
m_response.setContentType("application/x-msdownload");
else if (s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength((int) l);
m_contentDisposition = m_contentDisposition != null ? m_contentDisposition
: "attachment;";
if (s2 == null)
m_response.setHeader("Content-Disposition", m_contentDisposition
+ " filename=" + getFileName(s));
else if (s2.length() == 0)
m_response.setHeader("Content-Disposition", m_contentDisposition);
else
m_response.setHeader("Content-Disposition", m_contentDisposition
+ " filename=" + s2);
while ((long) k < l) {
int j = fileinputstream.read(abyte0, 0, i);
k += j;
m_response.getOutputStream().write(abyte0, 0, j);
}
fileinputstream.close();
}太长放不下
if (resultset == null)
throw new IllegalArgumentException(
"The RecordSet cannot be null (1045).");
if (s == null)
throw new IllegalArgumentException(
"The columnName cannot be null (1050).");
if (s.length() == 0)
throw new IllegalArgumentException(
"The columnName cannot be empty (1055).");
byte abyte0[] = resultset.getBytes(s);
if (s1 == null)
m_response.setContentType("application/x-msdownload");
else if (s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength(abyte0.length);
if (s2 == null)
m_response.setHeader("Content-Disposition", "attachment;");
else if (s2.length() == 0)
m_response.setHeader("Content-Disposition", "attachment;");
else
m_response.setHeader("Content-Disposition", "attachment; filename="
+ s2);
m_response.getOutputStream().write(abyte0, 0, abyte0.length);
} public void fieldToFile(ResultSet resultset, String s, String s1) throws ServletException, IOException, SmartUploadException, SQLException {
try {
if (m_application.getRealPath(s1) != null)
s1 = m_application.getRealPath(s1);
InputStream inputstream = resultset.getBinaryStream(s);
FileOutputStream fileoutputstream = new FileOutputStream(s1);
int i;
while ((i = inputstream.read()) != -1)
fileoutputstream.write(i);
fileoutputstream.close();
} catch (Exception exception) {
throw new SmartUploadException("Unable to save file from the DataBase (1020).");
}
} private String getDataFieldValue(String s, String s1) {
String s2 = new String();
String s3 = new String();
int i = 0;
s2 = s1 + "=" + '"';
i = s.indexOf(s2);
if (i > 0) {
int j = i + s2.length();
int k = j;
s2 = "\"";
int l = s.indexOf(s2, j);
if (k > 0 && l > 0)
s3 = s.substring(k, l);
}
return s3;
} private String getFileExt(String s) {
String s1 = new String();
int i = 0;
int j = 0;
if (s == null)
return null;
i = s.lastIndexOf('.') + 1;
j = s.length();
s1 = s.substring(i, j);
if (s.lastIndexOf('.') > 0)
return s1;
else
return "";
} private String getContentType(String s) {
String s1 = new String();
String s2 = new String();
int i = 0;
s1 = "Content-Type:";
i = s.indexOf(s1) + s1.length();
if (i != -1) {
int j = s.length();
s2 = s.substring(i, j);
}
return s2;
} private String getTypeMIME(String s) {
int i = 0;
i = s.indexOf("/");
if (i != -1)
return s.substring(1, i);
else
return s;
} private String getSubTypeMIME(String s) {
int i = 0;
i = s.indexOf("/") + 1;
if (i != -1) {
int j = s.length();
return s.substring(i, j);
} else {
return s;
}
} private String getContentDisp(String s) {
String s1 = new String();
int i = 0;
int j = 0;
i = s.indexOf(":") + 1;
j = s.indexOf(";");
s1 = s.substring(i, j);
return s1;
} private void getDataSection() {
int i = m_currentIndex;
int j = 0;
int k = m_boundary.length();
m_startData = m_currentIndex;
m_endData = 0;
while (i < m_totalBytes)
if (m_binArray[i] == (byte) m_boundary.charAt(j)) {
if (j == k - 1) {
m_endData = ((i - k) + 1) - 3;
break;
}
i++;
j++;
} else {
i++;
j = 0;
}
m_currentIndex = m_endData + k + 3;
} private String getDataHeader() {
int i = m_currentIndex;
int j = 0;
for (boolean flag1 = false; !flag1;)
if (m_binArray[m_currentIndex] == 13
&& m_binArray[m_currentIndex + 2] == 13) {
flag1 = true;
j = m_currentIndex - 1;
m_currentIndex = m_currentIndex + 2;
} else {
m_currentIndex++;
} String s = new String(m_binArray, i, (j - i) + 1);
return s;
} private String getFileName(String s) {
int i = 0;
i = s.lastIndexOf('/');
if (i != -1)
return s.substring(i + 1, s.length());
i = s.lastIndexOf('\\');
if (i != -1)
return s.substring(i + 1, s.length());
else
return s;
} public void setDeniedFilesList(String s) throws ServletException, IOException, SQLException {
if (s != null) {
String s2 = "";
for (int i = 0; i < s.length(); i++)
if (s.charAt(i) == ',') {
if (!m_deniedFilesList.contains(s2))
m_deniedFilesList.addElement(s2);
s2 = "";
} else {
s2 = s2 + s.charAt(i);
} if (s2 != "")
m_deniedFilesList.addElement(s2);
} else {
m_deniedFilesList = null;
}
} public void setAllowedFilesList(String s) {
if (s != null) {
String s2 = "";
for (int i = 0; i < s.length(); i++)
if (s.charAt(i) == ',') {
if (!m_allowedFilesList.contains(s2))
m_allowedFilesList.addElement(s2);
s2 = "";
} else {
s2 = s2 + s.charAt(i);
} if (s2 != "")
m_allowedFilesList.addElement(s2);
} else {
m_allowedFilesList = null;
}
} public void setDenyPhysicalPath(boolean flag) {
m_denyPhysicalPath = flag;
} public void setForcePhysicalPath(boolean flag) {
m_forcePhysicalPath = flag;
} public void setContentDisposition(String s) {
m_contentDisposition = s;
} public void setTotalMaxFileSize(long l) {
m_totalMaxFileSize = l;
} public void setMaxFileSize(long l) {
m_maxFileSize = l;
} protected String getPhysicalPath(String s, int i) throws IOException {
String s1 = new String();
String s2 = new String();
String s3 = new String();
boolean flag = false;
s3 = System.getProperty("file.separator");
if (s == null)
throw new IllegalArgumentException(
"There is no specified destination file (1140).");
if (s.equals(""))
throw new IllegalArgumentException(
"There is no specified destination file (1140).");
if (s.lastIndexOf("\\") >= 0) {
s1 = s.substring(0, s.lastIndexOf("\\"));
s2 = s.substring(s.lastIndexOf("\\") + 1);
}
if (s.lastIndexOf("/") >= 0) {
s1 = s.substring(0, s.lastIndexOf("/"));
s2 = s.substring(s.lastIndexOf("/") + 1);
}
s1 = s1.length() != 0 ? s1 : "/";
File file = new File(s1);
if (file.exists())
flag = true;
if (i == 0) {
if (isVirtual(s1)) {
s1 = m_application.getRealPath(s1);
if (s1.endsWith(s3))
s1 = s1 + s2;
else
s1 = s1 + s3 + s2;
return s1;
}
if (flag) {
if (m_denyPhysicalPath)
throw new IllegalArgumentException(
"Physical path is denied (1125).");
else
return s;
} else {
throw new IllegalArgumentException(
"This path does not exist (1135).");
}
}
if (i == 1) {
if (isVirtual(s1)) {
s1 = m_application.getRealPath(s1);
if (s1.endsWith(s3))
s1 = s1 + s2;
else
s1 = s1 + s3 + s2;
return s1;
}
if (flag)
throw new IllegalArgumentException(
"The path is not a virtual path.");
else
throw new IllegalArgumentException(
"This path does not exist (1135).");
}
if (i == 2) {
if (flag)
if (m_denyPhysicalPath)
throw new IllegalArgumentException(
"Physical path is denied (1125).");
else
return s;
if (isVirtual(s1))
throw new IllegalArgumentException(
"The path is not a physical path.");
else
throw new IllegalArgumentException(
"This path does not exist (1135).");
} else {
return null;
}
} public void uploadInFile(String s) throws IOException, SmartUploadException {
int i = 0;
int j = 0;
if (s == null)
throw new IllegalArgumentException(
"There is no specified destination file (1025).");
if (s.length() == 0)
throw new IllegalArgumentException(
"There is no specified destination file (1025).");
if (!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is denied (1035).");
i = m_request.getContentLength();
m_binArray = new byte[i];
int k;
for (; j < i; j += k)
try {
k = m_request.getInputStream().read(m_binArray, j, i - j);
} catch (Exception exception) {
throw new SmartUploadException("Unable to upload.");
} if (isVirtual(s))
s = m_application.getRealPath(s);
try {
File file = new File(s);
FileOutputStream fileoutputstream = new FileOutputStream(file);
fileoutputstream.write(m_binArray);
fileoutputstream.close();
} catch (Exception exception1) {
throw new SmartUploadException(
"The Form cannot be saved in the specified file (1030).");
}
} private boolean isVirtual(String s) {
if (m_application.getRealPath(s) != null) {
File file = new File(m_application.getRealPath(s));
return file.exists();
} else {
return false;
}
} protected byte m_binArray[];
protected HttpServletRequest m_request;
protected HttpServletResponse m_response;
protected ServletContext m_application;
private int m_totalBytes;
private int m_currentIndex;
private int m_startData;
private int m_endData;
private String m_boundary;
private long m_totalMaxFileSize;
private long m_maxFileSize;
private Vector m_deniedFilesList;
private Vector m_allowedFilesList;
private boolean m_denyPhysicalPath;
private boolean m_forcePhysicalPath;
private String m_contentDisposition;
public static final int SAVE_AUTO = 0;
public static final int SAVE_VIRTUAL = 1;
public static final int SAVE_PHYSICAL = 2;
private Files m_files;
private Request m_formRequest;
}
现在问题不是用什么组件,问题是在一个请求到来之时,将request.getInputStream()全部输出就不可能。
你神马原因?
SmartUploadExceptionpackage com.jspsmart.upload;public class SmartUploadException extends Exception { /**
*
*/
private static final long serialVersionUID = 955299344038904119L; SmartUploadException(String s) {
super(s);
}
}最后还是想说不要使用SmartUpload好,我以前发表的纯jsp上传下载的封装都比这个好很多。
返回此输入流方法的下一个调用方可以不受阻塞地从此输入流读取(或跳过)的字节数。下一个调用方可能是同一个线程,也可能是另一个线程。
类 InputStream 的 available 方法总是返回 0。 此方法应该由子类重写。 ServletInputStream 没有重写该方法 所以你调用的
int canread = request.getInputStream().available(); //这个值总是0在你后面的代码中你用了这个结果0产生了一个-1的返回
我都说要么是你代码有问题,要么是SmartUpload的问题了,你从来都不去看原代码的吗?
Struts2 一上 jspSmartUpload 便不能正常工作了,因为 Struts2 的过滤器 org.apache.struts2.dispatcher.FilterDispatcher 拦截的是所有的请求,在交把请求交给 jspSmartUpload 之前请求 request 就已被处理过了,即使是把 struts2-core-2.x.x.jar 中的 struts-default.xml fileUpload 取消了也是如此。
你确信Struts2 一上 jspSmartUpload 便不能正常工作了吗?
你真的读懂过jspSmartUpload 的工作原理吗?
你会修改我上面给出的简略版jspSmartUpload 原码吗?
你知道Struts2本身自代上传吗?